Pls help solve asap this is chem h

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Which of the following units is not an official si unit? mole liter kilogram ampere

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?